Details about this were presented in a paper at the USENIX conference a few weeks ago. Join us after the break where we’ve embedded the thirty-minute talk. There’s a lot of interesting stuff in there. The IM-ME can be used to decode the metadata that starts each radio communication. That means you can track who is talking to whom. But for us the most interesting part was starting at about 15:30 when the presenter, [Matt Blaze], talked about directed jamming that can be used to alter law enforcement behavior. A jammer can be set to only jam encrypted communications. This may prompt an officer to switch off encryption, allowing the attackers to listen in on everything being said to or from that radio.